Eduard has come out with several photo etch sets for the 1/200 Scale, Merit, USS Hornet CV-8 (kit# 62001) and this is one of them. Part 4 provides detail parts to upgrade the 20 mm Oerlikon AA Guns.
The set includes a large sheet of photo etch with a lot of little parts. You get new gun shields and brackets, sights, forward and aft ammo drum covers with handles, elevation wheels and a harness for the gunner. Also included is a new deck (nice looking non-skid) that the guns sit on. You get two options one with the expended ammo canister and one without.
Assembly is straight forward but extremely fiddly. There are a bunch of very tiny parts that need to be bent and shaped. Most of the small parts are hard to hold and glue at the same time. This makes for a time consuming and sometimes aggravating assembly. Thank you Eduard for providing extra parts. There are only 30 of these mounts so pace yourself accordingly.